Actually it is my amanos eating both types of algaes.
I've now been observing barbs for 2 days and making conclusion that I don't think they are that great in terms of eating algae. I see them pull some hair algae off but they are not actively looking for them. And I fed nothing during the last two days in the tank. I finally gave in and just fed them decent food (NLS pellets). The whole tank went crazy.
Amanos on the other hand, are really good with algaes. They managed to remove most of the pesky hair algae berried inside Java Moss. I switched with another Java Moss bunch from the main tank and they are at it again. They also ate BBA on Java Ferns that I have placed in the shrimp tank. They don't eat clean but I would say they ate about 70% of them. Its amazing that they find these new plants within seconds after placing them in the tank. This Java Fern is only like 1 inch tall and within 1 min, two of them are on it already.
After 2.5 days, I finally fed shrimps some real food too. I fed them 1mm NLS pelletes. They found those 10 grains or so I dropped in the tank within seconds and ran away with them... Looking at them, I think next time I am going to feed them the growth pelletes - 1mm pelletes look like water melons on them.
Now that I spoiled their diet, it will be interesting to see if they continue to eat algae... haha.